Centrifugal speed governor



June 25', 1957 F. HEINZMANN 2,797,079

CENTRIFUGAL SPEED GOVERNOR Filed Aug. 5. 1955- 2 Sheets-Sheet 1 Fig. 7

June 25, 1957 F. HElNzMANN 2,797,079

CENTRIFUGl-U.. SPEED GOVERNOR Filed Aug. 5. 195s 2 sheets-sheet 2 United States Patent ce CENTRIFUGAL SPEED GOVERNOR Fritz Henzmaun, Albershausen, Germany Application August 5, 1953, Serial No. 372,439

2 Claims. (Cl. 264-15) In most cases the centrifugal governors having weights of standard size are mounted on a shaft of small diameter or at the end of a shaft. There are, however, cases of application in which the centrifugal governor is mounted directly on the through shaft of the prime mover, this shaft having an exceptionally big diameter. Sometimes, these exceptional cases require, in order to provide for a simple system of rods and levers connecting governor and distributing mechanism, a big governing stroke or the inverted sense of direction of the governor sleeve. The object of the present invention is to cover these cases of application by structural arrangements allowing the use of weights, stay bolt screws, and spring nuts of standard size.

Fig. 1 is a perspective view of the centrifugal governor.

Fig. 2 is a side elevation partially in section of the governor shown in Fig. l.

Fig. 3 is a vertical section of the embodiment shown in Fig. l.

Fig. 4 is a side elevation partially in section of a further embodiment in accordance with the invention.

Fig. 5 is a vertical section of the embodiment shown in Fig. 4.

Referring to Figs. 1, 2, and 3: The weights 1 are pivotally seated in governor support 2 by means of pivots 3. The standard type weights 1 having a small radius R are, while they are in their inner position in contact with the pads 16 integral with governor support 2 and stretching in axial direction from the governor support end to the governor support bar 20. The distance a from center to center of two holes of pivots 3 is increased with regard to the standard design. In the arms 4 of weights 1 the bolts 19 are movably seated with their cylindrical ends. The outer attened ends of bolts 19 are slidingly fitted in slots of the arms 12 rmly ixed to the sleeve 6. The arms 12 are integral with the guide gibs 18 of sleeve 6. The gibs 18 are guided in grooves 13 of governor support 2. By rods and levers not shown in the figures sleeve 6 is connected with the distributing mechanism of the prime mover. The spring supports 7 are movably seated in the weights 1. With their inner end the springs 8 press against the spring supports 7, with their outer end against the nuts 10 screwed on the stay bolt screws 11 screwed up to governor support 2.

Referring to Figs. 4 and 5: The weights 1 are pivotally seated in the governor support 2 by means of pivots 3. The standard type weights 1 are, while they are in their inner position, in contact with the pads 17 of the governor support 2. These pads 17 integral with governor support 2 and stretching in axial direction from the governor support end to the governor support bar 20 are rising in height, by which structure the stroke of the weights 1 and hence the shift of the sleeve 6 areincreased. With two arms 4 the weights 1 are placed in hollows 14 of sleeve 6. The arms 4 are provided with slots 15 in which the flattened ends of the bolts 5 are sliding. The cylindrical ends of the bolts 5 are movably seated in `sleeve 6. By means of the shoulders existing between the cylindrical 2,797,079 Patented June 25, 1957- part and the flattened part the bolt 5 is urged on both sides against the arms 4 of the weights 1 due to the action of the centrifugal force so that it cannot fall out.

. In this way the Ause of standard type weights, stay bolt Vscrews and spring nuts made for a small diameter of the through shaft is also possible in governors mounted on a through shaft having a big diameter. Obtaining a big governing stroke is made possible even though the space available for the mounting of the governor is comparatively small. In such cases in which the sense of direction of the governor sleeve must be inverse so that the sleeve moves away from the governor support during the outward movement of the weights, this is possible by means of a simple structure of the sleeve and of few structural elements. The pads 16 or 17 allow the screws 11 to be screwed in more deeply, whereby reliability of operation of the governor is increased. The bolts 5 or 19 do not require any additional securing elements; they are secured by themselves and cannot fall out.

The present invention is not restricted to the applicatio`n shown in the drawings. It can also be used for centrifugal governors having weights pivotally connected With bell cranks instead of centrifugal governors having weights integral with bell cranks. Furthermore, the present invention can also be applied to maximum-minimum governors instead of single speed range governors.

I claim:

1. A centrifugal governor for prime movers comprising a governor support fixed on a shaft driven by the prime mover, said governor support consisting of a hub having at one end two upright bars integral with it and opposed to each other, said hub having two pads integral both with it and with said bars and stretching in axial direction, said hub having furthermore two opposite rectangular guide grooves located in axial direction between said pads, two weights being supported in closed position by said pads, means to support said weights on said governor support bars consisting of pivot pins, said weights having arms with cylindrical pivot holes perpendicular to the governor axis, a governor sleeve having arms guided in said rectangular guide grooves of said governor support hub, said arms having slots at their outer ends, means to connect said sleeve to said weights consisting of cylindrical pins attened at one end to form two faces parallel to each other, the cylindrical pivot pins being in said pivot holes of said weights, the flattened ends of said pivot pins being in contact with said slots in said arms of said governor sleeve, said governor sleeve sliding in axial direction on the free end of said governor support hub owing to the movement of said weights, stay bolt screws firmly fixed in said governor support and passing freely through said weights, nuts screwed on the outer ends of said stay bolt screws, spring supports being movably seated in said weights, springs surrounding said stay bolt screws and being supported at their inner ends by said spring supports and at their outer ends by said nuts, said springs resisting to the outward movement of said weights.

2. A centrifugal governor for prime movers comprising a governor support fixed on a shaft driven by the prime mover, said governor support consisting of a hub having at one end two upright bars integral with it and opposed to each other, said hub having two pads integral both with it and with said bars and stretching in increasing height from the free end towards said bars, said hub having furthermore two opposite rectangular guide grooves located in axial direction between said pads, two weights being supported in closed position by said pads, means to support said weights on said governor support bars consisting of pivot pins, said weights having arms with cylindrical pivot holes perpendicular to the governor axis, a governor sleeve having arms guided in said rectangular guide grooves of said governor support hub, said arms having slots at their-` out'er ends; means' to connect said sleeve to said weightsconsistingofcylindrical-pins'attenedatoneiendto form two faces parallel to each other, the cylindrical pivot pins being in said pivot holesof said weights, the attened endsofi'said pivotpinsbeing'in contactwith said slots in said arms Aofesaicf governorsleeve, said 'governorsleeve sliding in axialdirection on the' free end 'of `said governor 'sup'- portihubbwing to the movement' of said weights, stay b'olt screws` rmlyxedjin' jsaidk governor'supportarrd\pass= ingy freely througl'l' 'said' weights;nuts-screwedonthe outer 10 ends of said stay bolt screws, spring supports being movably seated `in said`weights, springs surrounding said`stay bolt screws and being supported at their inner ends by said spring supports and at their outer ends by said nuts, said 5 springs resisting to the outward movement of said weights.

References Cited in the le of this patent FOREIGN PATENTS 400,689: Great/Britain-; Nw; 2, 1933 

